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Entropy, Volume 23, Issue 10

2021 October - 133 articles

Cover Story: Information entropy concepts become useful in chemistry where chemical objects are representable as mathematical sets or have a probabilistic nature. The idea of the review is to collect under one title key works on the interrelated chemical applications of information entropy. They deal with molecular topology, electronic structure of atoms and molecules, stochastic physical and chemical processes, and signal processing. The cover picture stresses that information entropy could take a central place in interdisciplinary studies on the interface of physical, structural, and digital chemistry. View this paper
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Articles (133)

  • Article
  • Open Access
8 Citations
3,328 Views
28 Pages

19 October 2021

Multi-focus image fusion is an important method used to combine the focused parts from source multi-focus images into a single full-focus image. Currently, to address the problem of multi-focus image fusion, the key is on how to accurately detect the...

  • Article
  • Open Access
16 Citations
2,835 Views
18 Pages

Study of Kinetic Freeze-Out Parameters as a Function of Rapidity in pp Collisions at CERN SPS Energies

  • Muhammad Waqas,
  • Huai-Min Chen,
  • Guang-Xiong Peng,
  • Abd Al Karim Haj Ismail,
  • Muhammad Ajaz,
  • Zafar Wazir,
  • Ramoona Shehzadi,
  • Sabiha Jamal and
  • Atef AbdelKader

19 October 2021

We used the blast wave model with the Boltzmann–Gibbs statistics and analyzed the experimental data measured by the NA61/SHINE Collaboration in inelastic (INEL) proton–proton collisions at different rapidity slices at different center-of-mass energie...

  • Article
  • Open Access
18 Citations
2,941 Views
18 Pages

19 October 2021

Message authentication is crucial because it encourages participants to accept countermeasures and further transmit messages to legitimate users in a network while maintaining the legitimacy of the identity of network members. An unauthorized user ca...

  • Article
  • Open Access
7 Citations
3,223 Views
17 Pages

19 October 2021

Gene network associated with Alzheimer’s disease (AD) is constructed from multiple data sources by considering gene co-expression and other factors. The AD gene network is divided into modules by Cluster one, Markov Clustering (MCL), Community Cluste...

  • Article
  • Open Access
3 Citations
2,968 Views
9 Pages

19 October 2021

The simple chemistry and structure of quartz together with its abundance in nature and its piezoelectric properties make convenient its employment for several applications, from engineering to Earth sciences. For these purposes, the quartz equations...

  • Technical Note
  • Open Access
81 Citations
9,569 Views
12 Pages

Scikit-Dimension: A Python Package for Intrinsic Dimension Estimation

  • Jonathan Bac,
  • Evgeny M. Mirkes,
  • Alexander N. Gorban,
  • Ivan Tyukin and
  • Andrei Zinovyev

19 October 2021

Dealing with uncertainty in applications of machine learning to real-life data critically depends on the knowledge of intrinsic dimensionality (ID). A number of methods have been suggested for the purpose of estimating ID, but no standard package to...

  • Article
  • Open Access
5 Citations
3,501 Views
11 Pages

19 October 2021

Complex biological systems consist of large numbers of interconnected units, characterized by emergent properties such as collective computation. In spite of all the progress in the last decade, we still lack a deep understanding of how these propert...

  • Article
  • Open Access
6 Citations
3,283 Views
19 Pages

18 October 2021

Vehicle detection is an essential part of an intelligent traffic system, which is an important research field in drone application. Because unmanned aerial vehicles (UAVs) are rarely configured with stable camera platforms, aerial images are easily b...

  • Article
  • Open Access
15 Citations
4,150 Views
40 Pages

Beware the Black-Box: On the Robustness of Recent Defenses to Adversarial Examples

  • Kaleel Mahmood,
  • Deniz Gurevin,
  • Marten van Dijk and
  • Phuoung Ha Nguyen

18 October 2021

Many defenses have recently been proposed at venues like NIPS, ICML, ICLR and CVPR. These defenses are mainly focused on mitigating white-box attacks. They do not properly examine black-box attacks. In this paper, we expand upon the analyses of these...

  • Article
  • Open Access
4 Citations
4,779 Views
16 Pages

Information Bottleneck Theory Based Exploration of Cascade Learning

  • Xin Du,
  • Katayoun Farrahi and
  • Mahesan Niranjan

18 October 2021

In solving challenging pattern recognition problems, deep neural networks have shown excellent performance by forming powerful mappings between inputs and targets, learning representations (features) and making subsequent predictions. A recent tool t...

  • Article
  • Open Access
27 Citations
13,822 Views
38 Pages

Entropy and Wealth

  • Demetris Koutsoyiannis and
  • G.-Fivos Sargentis

17 October 2021

While entropy was introduced in the second half of the 19th century in the international vocabulary as a scientific term, in the 20th century it became common in colloquial use. Popular imagination has loaded “entropy” with almost every negative qual...

  • Feature Paper
  • Article
  • Open Access
5 Citations
3,937 Views
21 Pages

17 October 2021

In the present article we propose the application of variants of the mutual information function as characteristic fingerprints of biomolecular sequences for classification analysis. In particular, we consider the resolved mutual information function...

  • Article
  • Open Access
2,649 Views
21 Pages

16 October 2021

This paper is devoted to study the existence of solutions and their regularity in the p(t)–Laplacian Dirichlet problem on a bounded time scale. First, we prove a lemma of du Bois–Reymond type in time-scale settings. Then, using direct variational met...

  • Article
  • Open Access
30 Citations
3,280 Views
13 Pages

Quantum Probes for the Characterization of Nonlinear Media

  • Alessandro Candeloro,
  • Sholeh Razavian,
  • Matteo Piccolini,
  • Berihu Teklu,
  • Stefano Olivares and
  • Matteo G. A. Paris

16 October 2021

Active optical media leading to interaction Hamiltonians of the form H=λ˜(a+a)ζ represent a crucial resource for quantum optical technology. In this paper, we address the characterization of those nonlinear media using quantum probes, as opposed to...

  • Article
  • Open Access
1 Citations
2,860 Views
21 Pages

16 October 2021

Block compressed sensing (BCS) is a promising technology for image sampling and compression for resource-constrained applications, but it needs to balance the sampling rate and quantization bit-depth for a bit-rate constraint. In this paper, we summa...

  • Article
  • Open Access
1 Citations
3,510 Views
22 Pages

Numerical Prediction of Two-Phase Flow through a Tube Bundle Based on Reduced-Order Model and a Void Fraction Correlation

  • Claire Dubot,
  • Cyrille Allery,
  • Vincent Melot,
  • Claudine Béghein,
  • Mourad Oulghelou and
  • Clément Bonneau

16 October 2021

Predicting the void fraction of a two-phase flow outside of tubes is essential to evaluate the thermohydraulic behaviour in steam generators. Indeed, it determines two-phase mixture properties and affects two-phase mixture velocity, which enable eval...

  • Article
  • Open Access
7 Citations
3,648 Views
18 Pages

16 October 2021

In this paper, a new variational Bayesian-based Kalman filter (KF) is presented to solve the filtering problem for a linear system with unknown time-varying measurement loss probability (UTVMLP) and non-stationary heavy-tailed measurement noise (NSHT...

  • Article
  • Open Access
9 Citations
5,395 Views
26 Pages

A Network Theory Approach to Curriculum Design

  • John O’Meara and
  • Ashwin Vaidya

15 October 2021

In this paper we hypothesize that education, especially at the scale of curriculum, should be treated as a complex system composed of different ideas and concepts which are inherently connected. Therefore, the task of a good teacher lies in elucidati...

  • Article
  • Open Access
20 Citations
4,188 Views
19 Pages

15 October 2021

We present the multifractal analysis of coherent states in kicked top model by expanding them in the basis of Floquet operator eigenstates. We demonstrate the manifestation of phase space structures in the multifractal properties of coherent states....

  • Article
  • Open Access
6 Citations
2,919 Views
24 Pages

15 October 2021

In a host of business applications, biomedical and epidemiological studies, the problem of multicollinearity among predictor variables is a frequent issue in longitudinal data analysis for linear mixed models (LMM). We consider an efficient estimatio...

  • Article
  • Open Access
12 Citations
3,495 Views
11 Pages

A Multi-Modal Fusion Method Based on Higher-Order Orthogonal Iteration Decomposition

  • Fen Liu ,
  • Jianfeng Chen ,
  • Weijie Tan  and
  • Chang Cai 

15 October 2021

Multi-modal fusion can achieve better predictions through the amalgamation of information from different modalities. To improve the performance of accuracy, a method based on Higher-order Orthogonal Iteration Decomposition and Projection (HOIDP) is p...

  • Article
  • Open Access
5 Citations
2,657 Views
12 Pages

15 October 2021

The discovery of quantized electric conductance by the group of van Wees in 1988 was a major breakthrough in physics. A decade later, the group of Schwab has proven the existence of quantized thermal conductance. Advancing from these and many other a...

  • Feature Paper
  • Article
  • Open Access
15 Citations
4,928 Views
21 Pages

14 October 2021

While the languages of the world vary greatly, they exhibit systematic patterns, as well. Semantic universals are restrictions on the variation in meaning exhibit cross-linguistically (e.g., that, in all languages, expressions of a certain type can o...

  • Article
  • Open Access
4 Citations
2,525 Views
17 Pages

14 October 2021

Nuclei detection is a fundamental task in the field of histopathology image analysis and remains challenging due to cellular heterogeneity. Recent studies explore convolutional neural networks to either isolate them with sophisticated boundaries (seg...

  • Article
  • Open Access
10 Citations
4,027 Views
21 Pages

Associations between Cardiovascular Signal Entropy and Cognitive Performance over Eight Years

  • Silvin P. Knight,
  • Louise Newman,
  • Siobhan Scarlett,
  • John D. O’Connor,
  • James Davis,
  • Celine De Looze,
  • Rose Anne Kenny and
  • Roman Romero-Ortuno

14 October 2021

In this study, the relationship between non-invasively measured cardiovascular signal entropy and global cognitive performance was explored in a sample of community-dwelling older adults from The Irish Longitudinal Study on Ageing (TILDA), both cross...

  • Article
  • Open Access
3 Citations
3,918 Views
21 Pages

14 October 2021

The strange behavior of subatomic particles is described by quantum theory, whose standard interpretation rejected some fundamental principles of classical physics such as causality, objectivity, locality, realism and determinism. Recently, a granula...

  • Review
  • Open Access
5 Citations
2,088 Views
16 Pages

14 October 2021

High dimensional atomic states play a relevant role in a broad range of quantum fields, ranging from atomic and molecular physics to quantum technologies. The D-dimensional hydrogenic system (i.e., a negatively-charged particle moving around a positi...

  • Review
  • Open Access
41 Citations
11,758 Views
14 Pages

Entropy: From Thermodynamics to Information Processing

  • Jordão Natal,
  • Ivonete Ávila,
  • Victor Batista Tsukahara,
  • Marcelo Pinheiro and
  • Carlos Dias Maciel

14 October 2021

Entropy is a concept that emerged in the 19th century. It used to be associated with heat harnessed by a thermal machine to perform work during the Industrial Revolution. However, there was an unprecedented scientific revolution in the 20th century d...

  • Article
  • Open Access
4 Citations
2,571 Views
8 Pages

14 October 2021

Channel secret key generation (CSKG), assisted by the new material intelligent reflecting surface (IRS), has become a new research hotspot recently. In this paper, the key extraction method in the IRS-aided low-entropy communication scenario with adj...

  • Article
  • Open Access
4 Citations
2,630 Views
13 Pages

14 October 2021

Motivated by the sidewise motions of dynein motors shown in experiments, we use a variant of the exclusion process to model the multistep dynamics of dyneins on a cylinder with open ends. Due to the varied step sizes of the particles in a quasi-two-d...

  • Article
  • Open Access
2 Citations
3,030 Views
11 Pages

Economic Cycles of Carnot Type

  • Constantin Udriste,
  • Vladimir Golubyatnikov and
  • Ionel Tevy

14 October 2021

Originally, the Carnot cycle was a theoretical thermodynamic cycle that provided an upper limit on the efficiency that any classical thermodynamic engine can achieve during the conversion of heat into work, or conversely, the efficiency of a refriger...

  • Article
  • Open Access
1 Citations
2,917 Views
11 Pages

The Spread of Ideas in a Network—The Garbage-Can Model

  • Dorota Żuchowska-Skiba,
  • Maria Stojkow,
  • Malgorzata J. Krawczyk and
  • Krzysztof Kułakowski

14 October 2021

The main goal of our work is to show how ideas change in social networks. Our analysis is based on three concepts: (i) temporal networks, (ii) the Axelrod model of culture dissemination, (iii) the garbage can model of organizational choice. The use o...

  • Article
  • Open Access
10 Citations
2,979 Views
15 Pages

A Hidden Chaotic System with Multiple Attractors

  • Xiefu Zhang,
  • Zean Tian,
  • Jian Li,
  • Xianming Wu and
  • Zhongwei Cui

14 October 2021

This paper reports a hidden chaotic system without equilibrium point. The proposed system is studied by the software of MATLAB R2018 through several numerical methods, including Largest Lyapunov exponent, bifurcation diagram, phase diagram, Poincaré...

  • Article
  • Open Access
13 Citations
4,719 Views
18 Pages

Entropy and Network Centralities as Intelligent Tools for the Investigation of Terrorist Organizations

  • Alexandros Z. Spyropoulos,
  • Charalampos Bratsas,
  • Georgios C. Makris,
  • Evangelos Ioannidis,
  • Vassilis Tsiantos and
  • Ioannis Antoniou

13 October 2021

In recent years, law enforcement authorities have increasingly used mathematical tools to support criminal investigations, such as those related to terrorism. In this work, two relevant questions are discussed: “How can the different roles of members...

  • Article
  • Open Access
6 Citations
2,976 Views
18 Pages

12 October 2021

Based on elastic mechanics, the fluid–structure coupling theory and the finite element method, a high-speed railway wheel-rail rolling-aerodynamic noise model is established to realize the combined simulation and prediction of the vibrations, rolling...

  • Review
  • Open Access
5 Citations
3,881 Views
36 Pages

12 October 2021

An extensive survey of open literature reveals the need for a unifying approach for characterizing the degradation of tribo-pairs. This paper focuses on recent efforts made towards developing unified relationships for adhesive-type wear under unlubri...

  • Article
  • Open Access
30 Citations
4,250 Views
20 Pages

PAC-Bayes Unleashed: Generalisation Bounds with Unbounded Losses

  • Maxime Haddouche,
  • Benjamin Guedj,
  • Omar Rivasplata and
  • John Shawe-Taylor

12 October 2021

We present new PAC-Bayesian generalisation bounds for learning problems with unbounded loss functions. This extends the relevance and applicability of the PAC-Bayes learning framework, where most of the existing literature focuses on supervised learn...

  • Article
  • Open Access
1 Citations
3,514 Views
17 Pages

12 October 2021

This paper investigates the nested Monte Carlo tree search (NMCTS) for feature selection on regression tasks. NMCTS starts out with an empty subset and uses search results of lower nesting level simulation. Level 0 is based on random moves until the...

  • Article
  • Open Access
2 Citations
2,052 Views
11 Pages

12 October 2021

I propose a quantum metrology protocol for measuring frequencies and weak forces based on a periodic modulating quantum Jahn–Teller system composed of a single spin and two bosonic modes. I show that, in the first order of the frequency drive, the ti...

  • Article
  • Open Access
9 Citations
2,679 Views
23 Pages

11 October 2021

In this paper, a new multiple attribute decision-making (MADM) method under q-rung dual hesitant fuzzy environment from the perspective of aggregation operators is proposed. First, some aggregation operators are proposed for fusing q-rung dual hesita...

  • Article
  • Open Access
3 Citations
2,864 Views
31 Pages

Spatial Warped Gaussian Processes: Estimation and Efficient Field Reconstruction

  • Gareth W. Peters,
  • Ido Nevat,
  • Sai Ganesh Nagarajan and
  • Tomoko Matsui

11 October 2021

A class of models for non-Gaussian spatial random fields is explored for spatial field reconstruction in environmental and sensor network monitoring. The family of models explored utilises a class of transformation functions known as Tukey g-and-h tr...

  • Article
  • Open Access
1 Citations
2,521 Views
15 Pages

11 October 2021

One of the important steps in the annotation of genomes is the identification of regions in the genome which code for proteins. One of the tools used by most annotation approaches is the use of signals extracted from genomic regions that can be used...

  • Article
  • Open Access
3 Citations
2,498 Views
13 Pages

11 October 2021

Calculation of the thermal conductivity of nanofluids by molecular dynamics (MD) is very common. Regrettably, general MD can only be employed to simulate small systems due to the huge computation workload. Instead, the computation workload can be con...

  • Article
  • Open Access
12 Citations
4,227 Views
13 Pages

The Relativity of Indeterminacy

  • Flavio Del Santo and
  • Nicolas Gisin

11 October 2021

A long-standing tradition, largely present in both the physical and the philosophical literature, regards the advent of (special) relativity—with its block-universe picture—as the failure of any indeterministic program in physics. On the contrary, in...

  • Article
  • Open Access
8 Citations
3,482 Views
25 Pages

Secret-Key Agreement by Asynchronous EEG over Authenticated Public Channels

  • Meiran Galis,
  • Milan Milosavljević,
  • Aleksandar Jevremović,
  • Zoran Banjac,
  • Aleksej Makarov and
  • Jelica Radomirović

11 October 2021

In this paper, we propose a new system for a sequential secret key agreement based on 6 performance metrics derived from asynchronously recorded EEG signals using an EMOTIV EPOC+ wireless EEG headset. Based on an extensive experiment in which 76 part...

  • Article
  • Open Access
2 Citations
4,181 Views
18 Pages

11 October 2021

Mental health issues are among the most common health issues nowadays, with attention-deficit hyperactivity disorder (ADHD) being the most common neurobehavioral disorder affecting children and adolescents. ADHD is a heterogeneous disease affecting p...

  • Article
  • Open Access
1 Citations
2,376 Views
9 Pages

Constraints on Non-Flat Starobinsky f(R) Dark Energy Model

  • Chao-Qiang Geng,
  • Yan-Ting Hsu and
  • Jhih-Rong Lu

10 October 2021

We study the viable Starobinsky f(R) dark energy model in spatially non-flat FLRW backgrounds, where f(R)=RλRch[1(1+R2/Rch2)1] with Rch and λ representing the characteristic curvature scale and model parameter, respectively. We modify CAMB and Cos...

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Entropy - ISSN 1099-4300